lastChars method
Get the last n
characters of a string.
Returns the full string if its length is less than n
.
Implementation
String lastChars(int n) {
// Handle invalid length.
if (n <= 0) return '';
// If requested length is greater than or equal to string length, return the whole string.
if (n >= length) return this;
// Return the last n characters.
return substring(length - n);
}